Integrated test equipment for controllable commutation converter valve

Abstract

The utility model relates to the field of power electronic commutation technology, concretely is the comprehensive test equipment of controllable commutation valve, including main control unit, data conversion module, high voltage direct current unit, power frequency voltage unit, output control unit, output primary circuit, main control unit is connected with high voltage direct current unit, power frequency voltage unit, output control unit respectively. The utility model can carry out the test to IGBT submodule and thyristor submodule among controllable commutation valve simultaneously, in the testing process, need not prepare different test equipment and change equipment back and forth to can greatly shorten the repair time, improve the efficiency also effectively reduced the repair cost, and the operation of simple and quick of simultaneous test reduced the occupied space of equipment, has higher application value.

Description

Technical Field

[0001] This utility model relates to the field of power electronic converter technology, and more specifically, to a comprehensive testing device for controllable phase-commutation converter valves. Background Technology

[0002] Controllable commutation converter valve is a new type of DC transmission technology. By introducing a combination of fully controlled devices (such as IGBTs) and semi-controlled devices (such as thyristors), it achieves controllable turn-off and active commutation of thyristor valves, thereby fundamentally solving the commutation failure problem in high-voltage DC transmission systems.

[0003] Existing controllable commutation valves mainly consist of IGBT submodules and thyristor submodules (such as...) Figure 1 As shown in the figure, during routine maintenance, different testing equipment is needed to test the IGBT submodule and the thyristor submodule separately, resulting in low maintenance efficiency and high maintenance costs. Utility Model Content

[0004] This invention provides a comprehensive testing device for controllable phase-commutation valves, solving the technical problems in the prior art.

[0005] In view of the above problems, the technical solution proposed by this utility model is as follows: A comprehensive testing device for controllable commutator valves, characterized in that it includes: a main control unit, a data conversion module, a high-voltage DC unit, a power frequency voltage unit, an output control unit, and an output primary circuit; The main control unit is connected to the high voltage DC unit, the power frequency voltage unit, and the output control unit, respectively. The main control unit can analyze and determine the type of the sub-module under test according to the test control command, and control the power frequency voltage unit or the high voltage DC unit to output voltage test signals. At the same time, the main control unit can control the output primary circuit through the output control unit to apply the test signal to be output to the sub-module under test. The main control unit can send pulse signals or communication signals of the test items to the test sample through the data conversion module; The primary output circuit can collect the voltage and current signals output to the test object and send them to the data conversion module.

[0006] Furthermore, the data conversion module is interconnected with the main control unit via a parallel data bus, and the data conversion module is equipped with an optical signal interface.

[0007] Furthermore, the data conversion module consists of a photoelectric conversion module, a protocol conversion module, and an analog-to-digital conversion module.

[0008] Furthermore, the integrated testing equipment also includes a human-machine interaction unit, which is interconnected with the main control unit via an LVDS bus.

[0009] Furthermore, the main control unit and the output control unit are interconnected via GPIO.

[0010] Furthermore, the high-voltage DC unit is interconnected with the main control unit via an RS485 communication bus, and the power frequency voltage unit is interconnected with the main control unit via an RS485 communication bus.

[0011] Compared with the prior art, the beneficial effects of this utility model are as follows: Upon receiving the test control command, the main control unit 2 can determine whether the test is for a thyristor or an IGBT, further distinguishing which test operation it is, whether the required output voltage is power frequency voltage or DC voltage, and the voltage level. After analyzing the received operation command, it controls the power frequency voltage unit or high-voltage DC unit to output the corresponding voltage test signal. Simultaneously, the main control unit controls the output primary circuit through the output control unit to apply the test signal to the thyristor submodule or IGBT submodule. When applying the test signal to the test object, the main control unit sends the corresponding test item's pulse signal or... The communication signal enables the tested object to perform different actions while receiving the signal and report the corresponding optical pulse signal or optical communication signal to the data conversion module. The data conversion module records and analyzes the data reported by different tested sub-modules, packages it, and uploads it to the main control unit. Finally, the main control unit calculates and determines whether the test item is qualified. In summary, since this equipment can simultaneously test the IGBT sub-module and thyristor sub-module in the controllable commutation valve, there is no need to prepare different test equipment and change equipment back and forth during the test process. This can significantly shorten maintenance time, improve efficiency, and effectively reduce maintenance costs. At the same time, the test operation is simple and quick, and the equipment occupancy space is reduced, which has high application value. Attached Figure Description

[0012] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the embodiments will be briefly introduced below. It should be understood that the following drawings only show some embodiments of this utility model and should not be regarded as a limitation of the scope. For those skilled in the art, other related drawings can be obtained from these drawings without creative effort.

[0013] Figure 1 This is a schematic diagram of the topology of a controllable commutator valve. Figure 2This is a schematic diagram of the structure of the integrated testing equipment for the controllable phase-commutation valve in this utility model. Detailed Implementation

[0014] To make the objectives, technical solutions, and advantages of the embodiments of this utility model clearer, the technical solutions of the embodiments of this utility model will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0015] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the claimed invention, but merely to illustrate selected embodiments of the invention. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without inventive effort are within the scope of protection of the present invention.

[0016] Please see Figure 2 The comprehensive testing equipment for the controllable commutator valve provided by this utility model includes: a human-machine interaction unit 1, a main control unit 2, a data conversion module 3, a high-voltage DC unit 4, a power frequency voltage unit 5, an output control unit 6, and an output primary circuit 7.

[0017] The human-machine interaction unit 1 includes an LCD touch screen, mouse, keyboard, etc. This unit serves as the operating interface for maintenance personnel and can be used to issue experimental control commands, adjust the control parameters of the testing device, query test results, etc., making it convenient for staff to control the operation of the testing system.

[0018] The main control unit 2 adopts a high-performance DSP or FPGA chip architecture to execute test logic control. It is interconnected with the human-machine interface unit 1 via an LVDS bus. It can analyze and judge the received test control commands to determine whether to test the thyristor or the IGBT. It can further distinguish which test operation it is, whether the voltage to be output is power frequency voltage or DC voltage, and the voltage level. The main control unit 2 is interconnected with the high-voltage DC unit 4 and the power frequency voltage unit 5 via RS485 communication bus. After analyzing the received operation commands, it can control the power frequency voltage unit 5 or the high-voltage DC unit 4 to output the corresponding voltage test signal. At the same time, the main control unit 2 is interconnected with the output control unit 6 via GPIO. The output control unit 6 controls the output primary circuit 7 to apply the test signal to be output to the first-stage thyristor of the thyristor submodule or the first-stage IGBT of the IGBT submodule.

[0019] The data conversion module 3 consists of a photoelectric conversion module 31, a protocol conversion module 32, and an analog-to-digital conversion module 33. It is interconnected with the main control unit 2 via a parallel data bus. The data conversion module 3 is equipped with an optical signal interface for transmitting signals.

[0020] The photoelectric conversion module 31 communicates with the IGBT sub-module or thyristor sub-module under maintenance via an optical signal interface, and can convert the received optical signal into an electrical signal or convert the electrical signal sent by the main control unit into an optical signal for transmission.

[0021] The protocol conversion module 32 is responsible for receiving the electrical signals from the photoelectric conversion module 31 and processing and parsing them. If the received signal is a pulse signal from the thyristor submodule, it will summarize all the pulse width, pulse number, pulse spacing and other information received during the entire test cycle and transmit it to the main control unit 2. When the received signal is a communication signal from the IGBT submodule, it will actively parse the communication protocol of the IGBT submodule and transmit the parsed submodule status and other information to the main control unit 2.

[0022] The analog-to-digital converter module 33 can acquire the voltage and current signals in the primary circuit 7 through the sampling circuit, and convert the acquired analog signals into digital signals and transmit them to the main control unit 2.

[0023] The high-voltage DC unit 4 generates the ±10kV high-voltage signal required for testing the thyristor submodule; or generates the 0~5kV high-voltage signal for testing the IGBT submodule.

[0024] The power frequency voltage unit 5 generates the 380V power frequency voltage required for testing the thyristor submodule, or generates the 100V and 400V power frequency voltages for testing the IGBT submodule.

[0025] The output control unit 6 is interconnected with the main control unit 2 via GPIO. The main control unit controls the output of the primary circuit by controlling this module to achieve high and low voltage isolation.

[0026] The primary output circuit 7 is connected between the high-voltage unit, the power frequency voltage unit, and the electrodes of the sub-module under test (test output + is connected to the anode of the thyristor or the collector of the IGBT; test output - is connected to the cathode of the thyristor or the emitter of the IGBT), and the output of the test signal is controlled by the main control unit 2 through the control output control unit.

[0027] The working process of the comprehensive testing equipment for the controllable commutation valve provided in this application embodiment is as follows: 1. The operator issues test control commands through the human-machine interaction unit 1.

[0028] 2. When the main control unit 2 receives the test control command, it determines whether the test is to be performed on the thyristor or the IGBT, and further distinguishes which test operation it is, whether the voltage required for the test is the power frequency voltage or the DC voltage, and the voltage level of the output.

[0029] 3. After analyzing the received operation command, the main control unit 2 controls the power frequency voltage unit 5 or the high voltage DC unit 4 to output the corresponding voltage test signal. At the same time, the main control unit 2 controls the output primary circuit through the output control unit 6 to apply the test signal to be output to the first-stage thyristor of the thyristor submodule or the first-stage IGBT of the IGBT submodule.

[0030] 4. When a test signal is applied to the test object, the main control unit 2 sends the corresponding test item pulse signal or communication signal to the test object through the control data conversion module 3.

[0031] 5. When the tested object receives the applied voltage and current signals, it draws power through its own power-harvesting circuit to operate (the TTM board or high-potential board operates upon power-up).

[0032] 6. The TTM board or high-potential board of the tested item performs corresponding actions based on the received optical signal or voltage / current signal, including but not limited to: a. Thyristors can trigger actions, overvoltage protection actions, reverse recovery period protection trigger actions, and reverse recovery period end-of-recovery withstand actions depending on the applied voltage and the received optical signal. b. Depending on the applied voltage and the received optical communication, the IGBT may have actions such as turn-on, turn-off, power harvesting system action, power harvesting system power failure, submodule voltage monitoring, submodule overvoltage action, and submodule overvoltage recovery.

[0033] Different actions of the test object correspond to different voltage and current test signals and different optical pulse signals or optical communication signals. When the test object does not perform different actions, it will send different optical pulse signals or optical communication signals to the integrated test system through the optical interface.

[0034] 7. The primary output circuit 7 will collect the voltage and current signals output to the test object while outputting the test signal, and send them to the data conversion module 6.

[0035] 8. The data conversion module 6 receives the voltage and current signals collected by the primary circuit 7 throughout the entire test cycle and converts them into digital signals. At the same time, the data conversion module 6 receives the optical pulse signals or optical communication signals reported by the test object. If the test object is a thyristor submodule, it records all the pulse signals, pulse widths, pulse time intervals, etc. received throughout the entire test cycle. If the test object is an IGBT submodule, it parses the useful data in the optical communication according to the communication protocol.

[0036] 9. After the test system stops applying the test signal, the data conversion module 6 packages all the data and uploads it to the main control unit 2.

[0037] 10. The main control unit 2 calculates and determines whether the test item is qualified based on the received voltage and current information and optical signal information, and displays the test results on the interface through the human-machine interaction module 1, and provides the corresponding voltage and current test waveforms, as well as related optical signal information.

[0038] The above are merely preferred embodiments of this utility model and are not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A comprehensive testing device for controllable commutation valves, characterized in that, include: Main control unit (2), data conversion module (3), high voltage DC unit (4), power frequency voltage unit (5), output control unit (6), output primary circuit (7); The main control unit (2) is connected to the high voltage DC unit (4), the power frequency voltage unit (5), and the output control unit (6) respectively; The main control unit (2) can analyze and determine the type of the sub-module under test according to the test control command, and control the power frequency voltage unit (5) or the high voltage DC unit (4) to output voltage test signals. At the same time, the main control unit (2) can control the output primary circuit (7) through the output control unit (6) to apply the test signal to be output to the sub-module under test. The main control unit (2) can send pulse signals or communication signals of the test items to the test sample through the data conversion module (3); The primary output circuit (7) can collect the voltage and current signals output to the test object and send them to the data conversion module (3); The data conversion module (3) can accept the voltage and current signals collected by the output primary circuit (7) and convert them into digital signals.

2. The comprehensive testing equipment for the controllable commutation valve according to claim 1, characterized in that, The data conversion module (3) is interconnected with the main control unit (2) via a parallel data bus, and the data conversion module is provided with an optical signal interface.

3. The comprehensive testing equipment for the controllable commutation valve according to claim 2, characterized in that, The data conversion module (3) consists of a photoelectric conversion module (31), a protocol conversion module (32), and an analog-to-digital conversion module (33).

4. The comprehensive testing equipment for the controllable commutation valve according to claim 1, characterized in that, The integrated testing equipment also includes a human-computer interaction unit (1), which is interconnected with the main control unit (2) via an LVDS bus.

5. The comprehensive testing equipment for the controllable commutation valve according to claim 1, characterized in that, The main control unit (2) and the output control unit (6) are interconnected via GPIO.

6. The comprehensive testing equipment for the controllable commutation valve according to claim 1, characterized in that, The high-voltage DC unit (4) is interconnected with the main control unit (2) via an RS485 communication bus, and the power frequency voltage unit is interconnected with the main control unit via an RS485 communication bus.

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